JP4606424B2 - Crawler work vehicle - Google Patents

Description

  The present invention relates to a crawler-type work vehicle that is disposed on an upper part of a fuselage and includes a cabin in which a driver's seat is installed. More specifically, even when the rear glass of a cabin is opened and closed, the outer end of the cabin does not come into contact with the rear glass. Left and right sides that can be stored between the storage position and the use position on the left and right sliding members provided on the left and right stays fixed to the lower left and right rear frames of the cabin. It relates to providing a flasher lamp.

  In a conventional tractor (work vehicle), for example, an engine is mounted on an engine frame, the engine is covered with a bonnet, and a dashboard is disposed at the rear of the bonnet. In addition, an operation panel and a steering handle are disposed on the dashboard, and a seat is disposed behind the dashboard, and a driving unit such as the dashboard and the seat is covered with a cabin. A front glass is attached to the front surface of the cabin, a door glass is attached to the side surface, a rear glass is attached to the rear surface, and a flasher lamp as a direction indicator is provided on the lower side surface of the rear pillar (Patent Document 1).

JP 2003-175860 A

However, in such a tractor (work vehicle), the flasher lamp is fixed outwardly from the outer end portion of the cabin. Therefore, the flasher lamp cannot be stored inside the outer end portion of the cabin. During the work, there was a problem that the flasher lamp contacted an obstacle such as a branch and was damaged. Even if the flasher lamp is made to be retractable so that it can be stored inside the outer edge of the cabin, the rear glass will come into contact with the stored flasher lamp when the rear glass at the rear of the cabin is opened. There was also a problem of obstructing opening and closing.
Therefore, an object of the present invention is to improve safety and workability by providing a flasher lamp at a position that can be stored inside the outer end of the cabin during work and does not obstruct the opening and closing of the rear glass of the cabin during storage and use. It is to provide a crawler type tractor.

For this reason, the invention described in claim 1 is a crawler-type work vehicle that is arranged on the upper part of the fuselage and includes a cabin in which a driver's seat is installed. On the left and right sliding members provided on the left and right stays fixed to the lower part of the left and right rear frames of the cabin between the storage position and the use position. The flasher lamp is fixed at the storage position and the use position by a detent mechanism of a rotating portion provided between the sliding member and the stay. The rotating portion includes an outer cylinder that penetrates the stay, and a rotating shaft that fits into the outer cylinder and has a detent pin that has an upper end fixed to the upper lower surface of the sliding member. Of the outer cylinder The end portion is provided with a plurality of detent grooves into which the detent pin is fitted, and the lower end portion of the rotating shaft is supported in a support member attached in the outer cylinder, on the support member, between the outer cylinder and the rotating shaft, the rotating shaft lower outer circumference, the elastic member pulling the pivot shaft downward is provided, it the energizing force of the elastic member can be adjusted by the supporting member It is characterized by that.

According to the first aspect of the present invention, in a crawler type work vehicle having a cabin that is arranged in the upper part of the fuselage and has a driver's seat, even if the rear glass of the cabin is opened and closed, the cabin outside is not contacted It is a position that can be stored inside the end, and can be freely rotated between the storage position and the use position on the left and right sliding members provided on the left and right stays fixed to the lower left and right rear frames of the cabin. It has left and right flasher lamps, and the flasher lamps are fixed at the storage position and the use position by the detent mechanism of the rotating part provided between the sliding member and the stay, and the rotating part penetrates the stay And a rotating shaft having a detent pin fixed to the upper end of the sliding member, and fitted to the upper end of the outer cylinder. The detent pin is fitted to the upper end of the outer cylinder. Multiple detent grooves The lower end portion of the rotation shaft is supported in a support member attached to the outer cylinder, on the support member, on the outer peripheral surface of the lower portion of the rotation shaft between the outer cylinder and the rotation shaft, an elastic member to pull the pivot shaft downward is provided, the contact of the biasing force of the elastic member Runode be adjustable by the supporting member, the obstacles branch by housed inside than the outer end portion of the cabin when working In addition, it is possible to prevent the rear glass opening and closing of the cabin from being hindered both during storage and use. Therefore, a crawler tractor with improved safety and workability can be provided.

Further, there is no need to provide a separate motor or the like, and the flasher lamp can be rotated and fixed at a fixed position by a manual operation with a simple configuration. Therefore, it is possible to provide a crawler tractor that is reduced in cost.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
1 is a left side view of a crawler tractor according to an embodiment of the present invention, FIG. 2 is a plan view of the tractor, FIG. 3 is a cross-sectional side view of the drive unit, and FIG. 4 is a cross-sectional plan view of the drive unit.

  First, a schematic configuration of the crawler tractor 1 will be described. As shown in FIG. 1, a bonnet 2 that covers an engine 3 at the front of the vehicle 1 and has a headlight 12 at the front end, and a vehicle 1 on the steering column 16 at the rear of the dashboard 17 is located behind the bonnet 2. A cabin 4 having a steering section of the vehicle 1 in which a steering handle 9 and a driver's seat 8 that control the operation of the vehicle are respectively disposed is disposed on the left and right body frames 11. On the left and right sides of the driver's seat 8, various levers such as a main transmission lever, a sub transmission lever, and a PTO operation lever (not shown) for operating the vehicle 1 and raising / lowering a working machine (not shown) are disposed. .

  Further, the cabin 4 is formed of a roof 5, a windshield 14, a rear glass 13, a side glass door 15 and the like so as to cover the entire driver's seat 8. The left and right fuel tanks 6 and the left and right flasher lamps 105 are disposed on both sides of the driver's seat 8 and outside the cabin 4. Further, a step 10 for raising and lowering to the driver's seat 8 is provided below the cabin 4, and the working machine that can be removed depending on the work is attached to the rear of the vehicle 1. Work such as a rotary. In addition, a pair of left and right crawler type traveling devices 80 for traveling the vehicle 1 are disposed below the vehicle 1.

  The crawler type traveling device 80 includes a left and right crawler frame 81 extending in the traveling direction and two side frames 79 that connect the crawler frame 81. A left and right front axle case 82 is fixed to the front end of the crawler frame 81. The left and right drive sprocket 60 is supported on the left and right axles 89 supported by the left and right front axle cases 82. A left and right driven idler 85 is rotatably supported at the rear end of the crawler frame 81, and a crawler belt 88 is wound between the outer periphery of the driving sprocket 60 and the driven idler 85. The four equalizer wheels 86 are rotatably supported between the driven idler 85 and the front and rear.

  Hereinafter, first, the traveling and transmission system of the crawler tractor 1 will be described with reference to FIGS. The left and right axles 89 of the crawler type traveling device 80 are connected to the output shaft of the engine 3 via the forward / reverse switching mechanism 21, the main transmission gear transmission mechanism 22, the auxiliary transmission gear transmission mechanism 23, the traveling transmission shaft 24, and the differential mechanism 25. The PTO output shaft 29 that projects the rear transmission case 30a to the forward / reverse output shaft 26 of the forward / reverse switching mechanism 21 via the PTO clutch 27 and the PTO speed change gear transmission mechanism 28 while driving the vehicle 1 while being connected. Power is transmitted to the work machine that is connected and installed behind the machine body.

  Further, a forward / reverse switching mechanism 21 and a main transmission gear transmission mechanism 22 are provided in a transmission case 30b between the rear transmission case 30a and the engine 3, and the input shaft 31 of the forward / reverse switching mechanism 21 is connected via a damper 32. The main transmission shaft 33 of the main transmission gear transmission mechanism 22 is connected to the forward / reverse output shaft 26 of the forward / reverse switching mechanism 21 while being connected to the output shaft of the engine 3.

  Further, a sub-transmission gear transmission mechanism 23 is provided in the front part of the rear transmission case 30a, and a PTO transmission gear transmission mechanism 28 is provided in the rear part of the rear transmission case 30a. The main transmission shaft 33 is provided with the sub-transmission gear transmission mechanism 23. The auxiliary transmission shaft 34 is connected, the brake shaft 37 of the traveling brake device 36 is connected to the rear end of the auxiliary transmission shaft 34 via a pair of bevel gears 35, and the transmission is transmitted to the front end of the auxiliary transmission shaft 34 via the intermediate shaft 38. The rear end of the shaft 24 is connected.

  Next, the front mission case 30c is provided with a differential mechanism 25 including a left and right planetary gear mechanism 39, and a left and right sides are connected to the front end of the traveling transmission shaft 24 via a differential input shaft 40, a bevel gear 41, and a planetary gear input shaft 42. The planetary gear mechanism 39 is connected, and the traveling shift output from the traveling transmission shaft 24 is transmitted to the left and right axles 89 via the left and right planetary gear mechanisms 39 and the planetary gear output shaft 43, so that the left and right crawler type traveling devices 80 are identical at substantially the same speed. It is set as the structure which drives to a direction and makes the vehicle 1 drive forward or backward.

  Further, the turning HST pump 44 and the turning HST motor 45 of the turning hydraulic transmission mechanism (HST) for turning the machine body are separately arranged. For example, the turning HST pump 44 is arranged on the right outer side of the transmission case 30b. The pump shaft of the turning HST pump 44 is connected to the front end of the main transmission shaft 33 via a set of three transmission gears 46 so that the power after the main transmission is input to the pump shaft, and the front transmission case 30c The turning HST motor 45 is fixed to the front surface of the motor, and the motor shaft of the turning HST motor 45 is connected to the left and right planetary gear mechanism 39 via the left and right reversing bevel gear 49 and the left and right gear shafts 50. Steering output to be shifted by the turning HST motor 45 is transmitted to the left and right axles 89 via the left and right planetary gear mechanism 39, so Device 80 is driven at a substantially constant speed, and the rotational difference of the left and right crawler type traveling device 80 is proportional to the traveling speed of the main gear shift stage, and the left or right at the same turning radius even if the main gear shift stage is switched. It is set as the structure which turns a body in a direction.

  Furthermore, an air conditioner (not shown) or the like can be provided in the cabin 4 of the vehicle 1. In this case, since the engine 3 is loaded by the air conditioner drive, a controller (not shown) that electronically controls the rotational speed of the engine 3 is provided. With this controller, the rotational speed of a cooling fan that cools a condenser (not shown) of the air conditioner is proportional to the rotational speed of the engine 3, and the controller sets the idling rotational speed of the engine 3 more than when the air conditioner is stopped. When the engine 3 is idling up, the speed is increased so that the controller 3 is proportional to the height of the refrigerant pressure detected by a pressure sensor (not shown) that detects the discharge refrigerant pressure of a compressor (not shown). You may make it the structure which sets this.

  Next, a specific configuration of the flasher lamp according to the present invention will be described. 5 is a front view of the tractor, FIG. 6 is a rear view of the vicinity of the flasher lamp at the use position on the left side of the cabin, FIG. 7 is a side view of the vicinity of the flasher lamp at the use position, and FIG. 9 is a schematic plan view of the detent mechanism, FIG. 10 is an enlarged perspective view of the detent mechanism, FIG. 11 is a schematic plan view showing rotation of the flasher lamp, and FIG. 12 is a schematic plan view of the detent mechanism provided with a stopper. is there.

  As shown in FIGS. 5 to 7, one end of a left and right stay 101 made of a substantially U-shaped metal in a side view is provided on the outer side of the lower part of the left and right rear frames 100 supporting the cabin 4 above the left and right fuel tanks 6 at the rear of the cabin 4. The part is fixed. The outer end portions of the left and right stays 101 are provided at positions substantially equal to the positions of the outer end portions of the left and right fuel tanks 6.

  Next, a left and right sliding member 104 made of a substantially U-shaped metal in a side view is provided above the vicinity of the outer end portion of the left and right stay 101 via a left and right rotating portion 102 and a left and right detent mechanism 103 described later. The length of the sliding member 104 in the left-right direction is such that the outer end of the sliding member 104 is positioned in the vicinity of the approximate center of the left-right width of the crawler belt 88.

  In the vicinity of the outer end portion on the sliding member 104, left and right flasher lamps 105, which may be blinked for direction indications and hazards when the aircraft is running, or may be constantly lit, are fixed via the left and right flasher lamp stays 106. Established. The shape and material of the flasher lamp 105 are not limited. For example, the lamp 107 is stored in a short cylinder in the front-rear direction of the airframe when viewed from the front and back, and the lamp 107 is transparent or translucent on the front end surface and the rear end surface of the cylinder. A lid 108 that allows the flashing light to pass therethrough is fitted.

  Wirings (not shown) of the lamp 107 are connected from the inside of the flasher lamp stay 106 to the cabin 4 along the inner side of the sliding member 104 or the inner side of the stay 101. The flasher lamp 105 is rotated by the sliding member 104 by an operator's operation between the use position A when the machine is running and the storage position B such as work when necessary. Is a position where the lighting of the flasher lamp 105 can be reliably confirmed from the front and rear of the fuselage, and at the storage position B, it is stored inside the outer end portion of the cabin 4 including the left and right fuel tanks 6 during work. Thus, it is configured to prevent damage caused by contact with an obstacle such as a branch, and to prevent obstruction of the opening and closing of the rear glass 13 of the cabin 4 when the flasher lamp 105 is housed and used.

  Next, in the rotating portion 102, a rotating shaft 109 having an upper end portion 109a fixed to the lower surface 104a of the upper portion of the sliding member 104 is fitted into an outer cylinder 110 penetrating the stay 101, as shown in FIG. As described above, the lower end portion 109 b of the rotation shaft 109 is supported in the support member 111 attached in the outer cylinder 110. An elastic member 112 such as a compression spring is provided on the support member 111 and on the outer peripheral surface of the lower portion of the rotation shaft 109 between the outer cylinder 110 and the rotation shaft 109, and the rotation shaft 109 is an elastic member. It is configured to be pulled downward by the urging force of 112. In addition, the inside of the rotating shaft 109 does not ask | require the presence or absence of a cavity.

  Further, as shown in FIGS. 9 to 10, the outer cylinder 110 has, for example, substantially V-shaped detent grooves a, b, c, d at four locations at intervals of approximately 90 degrees in the front-rear direction and the left-right direction, respectively. The sliding member 104, which is horizontally installed through a side portion of the rotating shaft 109 located at substantially the same height as the detent grooves a, b, c, d and fixed by welding or the like, is provided. A detent pin e made of metal having an appropriate length that does not contact and has a cylindrical shape or the like is either a detent groove c, d in the front-rear direction of the machine body or a detent groove a, b in the left-right direction by the rotation of the rotation shaft 109. Fitted. The shape of the detent grooves a, b, c, d and the detent pin e and the material of the detent pin e are not limited to the above. Further, the detent pin e is not penetrated into the side portion of the rotating shaft 109, and two short detent pins that can be fitted into the detent grooves a, b, c, d are fixed to both side end portions at the same position by welding or the like. May be.

  Here, as shown in FIG. 11, when the flasher lamp 105 is rotated from the use position A such as when the vehicle is running to the storage position B such as when the work is performed, the operator manually moves the flasher lamp 105 to the use position A. Rotate approximately 90 degrees counterclockwise in plan view. At this time, the flasher lamp 105 fitted and fixed at the use position A so that the detent pin e is pulled downward in the detent grooves a and b by the elastic member 112 is moved to the storage position B by the rotation of the rotation shaft 109. Is rotated.

  As a result, the detent pin e moves on the outer cylinder 110 away from the detent grooves a and b against the urging force of the elastic member 112 and is fitted into the detent grooves c and d. Then, the detent pin e is fitted so as to be pulled downward in the detent grooves c and d by the urging force of the elastic member 112, and the flasher lamp 105 is fixed at the use position B.

  Further, when the flasher lamp 105 is rotated from the storage position B to the use position A, the operator rotates the flasher lamp 105 from the use position B by 90 degrees clockwise from the use position B, contrary to the above. . Then, the detent pin e fitted in the detent grooves c and d, which is the storage position B of the flasher lamp 105, moves on the outer cylinder 110 away from the detent grooves c and d against the urging force of the elastic member 112. And are fitted into the detent grooves a and b. As a result, the detent pin e is fitted by the urging force of the elastic member 112 so as to be pulled downward in the detent grooves a and b, and the flasher lamp 105 is fixed at the use position A.

  With the above-described configuration, the flasher lamp 105 is housed inside the outer end of the cabin 4 during work to prevent damage caused by contact with obstacles such as branches, and the rear glass of the cabin 4 is housed and used. 13 It is possible to prevent obstruction of opening and closing, and it is not necessary to provide a separate motor or the like, and the flasher lamp 105 is rotated by a manual operation by an operator and fixed to the use position A or the storage position B with a simple configuration. Can do.

  The urging force of the elastic member 112 in the detent mechanism 103 can be adjusted. In this case, by loosening the support member 111 as appropriate, the length of the elastic member 112 (the vertical direction of the fuselage) is increased, and the urging force upwards of the fuselage is increased so that the elastic member 112 is moved downward in the detent grooves a, b, c, d. The detent pin e can be strongly fitted to increase the feeling of turning operation of the flasher lamp 105. Further, by appropriately tightening the support member 111, the length of the elastic member 112 is shortened, the urging force upward of the machine body is weakened, and the fitting force of the detent pin e into the detent grooves a, b, c, d is increased. It is weaker than the above, and the rotating operation force of the flasher lamp 105 can be reduced. In this way, the turning operation force of the flasher lamp 105 can be adjusted according to the preference of the operator.

  Furthermore, a stopper 113 that prevents the flasher lamp 105 from rotating except between the use position A and the storage position B can be provided. In this case, for example, as shown in FIG. 12, the detent pin e is located between the detent groove a and the detent groove c from the detent groove a (the flasher lamp 105 is located at the use position A) in the clockwise direction in plan view. A stopper 113a made of a metal rod or the like for preventing rotation does not bring its end into contact with the rotation shaft 109, and the other end is provided inside the sliding member 104 by welding or a fastener (not shown). Between the groove b and the detent groove d, the detent pin e is from the same metal rod as described above which prevents the detent groove d (the flasher lamp 105 is located at the storage position B) from rotating counterclockwise in plan view. The stopper 113b is provided with the other end provided inside the sliding member 104 without contacting the end thereof with the rotation shaft 109. With such a configuration, the flasher lamp 105 can be prevented from rotating in an unnecessary direction other than between the use position A and the storage position B, and the rotating operability of the flasher lamp is improved.

  As described above in detail, the crawler tractor 1 of this example is provided on the upper part of the fuselage and includes the cabin 4 in which the driver's seat 8 is installed. Even if the rear glass 13 of the cabin 4 is opened and closed, the crawler tractor 1 is in contact with the rear glass 13. The position B can be stored inside the outer end portion of the cabin 4 without being moved, and the storage position B on the left and right sliding members 102 provided on the left and right stays 101 fixed to the lower part of the left and right rear frames 100 of the cabin 4. And a left and right flasher lamp 105 that is rotatable between the use position A and the use position A. In addition, the flasher lamp 105 is fixed between the storage position B and the use position A by a detent mechanism 103 provided between the sliding member 104 and the stay 101.

  In the above-described example, a crawler tractor (agricultural work vehicle) has been described as an example of a work vehicle. However, the present invention is not limited to this, and a wheel tractor, a combine as a farm work vehicle, or a construction The work vehicle can be applied to any work vehicle equipped with a flasher lamp and a cabin, such as a backhoe and a bull tosa.

It is a left view which shows the crawler type tractor as an example of this invention. It is a top view of a crawler type tractor. It is a cross-sectional side view of a drive part. It is a cross-sectional top view of a drive part. It is a front view of a crawler type tractor. It is a rear view of the vicinity of the flasher lamp at the use position on the left side of the cabin. It is a side view near the flasher lamp of a use position. It is side surface sectional drawing of a rotation part. It is a plane schematic diagram of a detent mechanism. It is an expansion perspective view of a detent mechanism. It is a plane schematic diagram which shows rotation of a flasher lamp. It is a schematic plan view of a detent mechanism provided with a stopper.

Explanation of symbols

4 cabin 13 rear glass 100 left and right rear frame 101 left and right stay 102 rotating portion 103 detent mechanism 104 sliding member 104a lower surface 105 flasher lamp 106 flasher lamp stay 107 lamp 108 lid 109 rotating shaft 109a upper end portion 109b lower end portion 110 outer cylinder 111 support Member 112 Elastic member 113, 113a, 113b Stopper A Use position B Storage position a, b, c, d Detent groove e Detent pin

Claims (1)

In a crawler-type work vehicle having a cabin arranged in the upper part of the fuselage and having a driver seat, even if the rear glass of the cabin is opened and closed, the position can be stored inside the cabin outer end without contacting the rear glass. The left and right flasher lamps that are rotatable between the storage position and the use position are provided on the left and right sliding members provided on the left and right stays fixed to the lower left and right rear frames of the cabin.
The flasher lamp is fixed at the storage position and the use position by a detent mechanism of a rotating part provided between the sliding member and the stay,
The rotating part includes an outer cylinder penetrating the stay, and a rotating shaft that fits into the outer cylinder and has a detent pin with an upper end fixed to the upper lower surface of the sliding member, A plurality of detent grooves into which the detent pins are fitted are provided at an upper end portion of the outer cylinder, and a lower end portion of the rotating shaft is supported in a support member attached in the outer cylinder, and is on the support member. An elastic member that pulls the rotating shaft downward is provided on the outer peripheral surface of the lower portion of the rotating shaft between the outer cylinder and the rotating shaft, and the biasing force of the elastic member can be adjusted by the support member characterized that you and the crawler type working vehicle.

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